Merge pull request #2031 from matrix-org/travis/1.0/voip-hangup

Add missing reason property to m.call.hangup

changelogs/client_server/newsfragments/2031.clarification

@@ -0,0 +1 @@
+Add missing ``reason`` to ``m.call.hangup``.

event-schemas/schema/m.call.hangup

@@ -15,6 +15,14 @@
                 "version": {
                     "type": "integer",
                     "description": "The version of the VoIP specification this message adheres to. This specification is version 0."
+                },
+                "reason": {
+                    "type": "string",
+                    "description": "Optional error reason for the hangup. This should not be provided when the user naturally ends or rejects the call. When there was an error in the call negotiation, this should be ``ice_failed`` for when ICE negotiation fails or ``invite_timeout`` for when the other party did not answer in time.",
+                    "enum": [
+                        "ice_failed",
+                        "invite_timeout"
+                    ]
                 }
             },
             "required": ["call_id", "version"]